Grinding or crushing head or roll.



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' GRINDING 0R GRUSHING HEAD on ROLL."

V APPLIGA'IION FILED LIAN. 6, 1902.

2 SHEETS-SHEET 1.

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Witness es:

PATBNTED 11130.1, 190.3.

" v. w. MASON, h. J

GRINDING 0R GRUSHING HEAD 0R ROLL. APPLICATION FILED JAN. 6, 1902.

H0 MODEL. I 2 SHEETS-SHEET 2.

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UNITED STATES.

Yatented becember I, 1903.

PAT N OFFICE.

VOLNEY W. MASON, JR., OF NEW YORK, N. Y.

GRINDING OR CRUSHING HEAD OR ROLL.

SPECIFICATION forming part of Letters Patent no. 745,640, dated December 1, 1903.

Application filed anuary 6, 1902. Serial No. 88.510. (No model.) I I To aZZ whom it may concern:

Be it known that I, VoLnEY W. MASON,

Jr., of New York, county of New York, and

is a specification, like letters on the draw-f ings representing like parts. In another application filed by me, Serial No. 56,358, a grinding or crushing head is shown comprising a core and a plurality of' transversely each dovetailed groove, and the A segments are formed or provided with keyreceiving recesses located opposite the keyreceiving recesses in the core, and keys are placed in said key-receiving recesses. Openings are formed or provided through the core for theintroduction of the keys, and as quite a number of segments are employed the core is formed or provided with a corresponding number of openings or passages leading to the koy-receivin g recesses. In some instances I find it is objectionable to provide the core with so many openings or passages through it; and this invention has for its object to improve the construction of the means for connecting the segments to the core, whereby the number of openings or passages through the core which lead to the key-receiving recesses may be reduced to the minimum.

In accordance with this invention the core is formed or provided with one or more circumferential grooves and with a plurality of longitudinal dovetailed grooves, and the segments are formed or provided with longitudinal dovetailed ribs and with one or more key-receiving recesses crossing them located opposite the circumferential groove or grooves in the core, and but a single opening or passage through the core need be made to each circumferential groove for the introduction of the keys,which will be curved to conform to the curvature of the core, al-

though more openings or passages may be employed if deemed desirable.

Figure 1 shows an end view and partial section of a grinding or crushing roll embodying this invention. Fig. 2 is a longitudinal vertical section of the same, taken ion the dotted line 2 2, Fig. 1.

,ments. Fig. 4 is a rear elevationof a modi- :fied form of external segment. Fig. 5 is a idetail showing a portion of the core in side elevation. Fig. 6 is a detail of one of the ]curved keys, and Fig. 7 is a modification showing in sid'eelevation and partial section a grinding or crushing head for gyratory @crusher embodying this invention.

} The core a is made as a cylinder of ordinary machineable metal and is of any suitable diameter and length and'is made hol- :low to receive a spindle or shaft.

The core a is formed or provided externally with a plurality of longitudinal dovetailed grooves a, which, as herein shown, extend from end to end thereof, said grooves being made wider at one end than at the other, and said grooves are oppositely arranged, the wide end of each groove being adjacent the narrow end of the next groove.

The segments b, of which there may be any desired number, are each provided upon its inner side with a dovetailed rib b,corresponding in shape to the dovetailed grooves a, be ing wider at one end than at the other, and herein shown as extending from end' to end of the segments, and said segments are also made wider at one end than at the other. The several segments will be disposed on the core in opposite ways, as shown.

To look the segments b to the core, said core is formed or provided with one or more circumferential grooves a two such grooves being herein shown, one near each end of the core, said grooves. crossing the dovetailed grooves a. at approximately right angles, and on the inner side of each-segment I) like grooves b are formed or provided, extending transversely across the ribs 1) at points opposite the grooves a. in the core, so that when said segments are placed on the core circumferential recesses will be produced extending e'ntirely and continuously around the core, between the core and segments.

rear elevation of one of the external seg Fig. 3is a A suitable opening or passage is provided through the core leading to each circumferential groove a although more than one such opening or passage may be provided, leading to each groove (1 if desired, and through said openings or passages curved or other shaped keys 0 will be introduced, which will be placed in the circumferential recesses provided between the core and segments. There will be as many of these keys 0 employed as deemed desirable, preferably one for each segment, although any suitable number may be employed, and said keys when properly placed in said circumferential groove will transversely cross the ribs bof the segments, and thereby hold said segments effectively against endwise movement on the core. The keys 0 having been placed in the circumferential groove or recess, the opening or openings leading thereto will be closed by means of zincor other fusible metal.

The segments 1) may be made with parallel sides, as shown in Fig. 4, if desired, and, furthermore, the core a may be made conical, as shown in Fig. 7,and the segments mounted thereon, said core and segments being formed or provided to produce between them a continuous circumferential recess or recesses around the core.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a grinding or crushing head or rollfa core having one or more continuous external circumferential grooves, and also having a plurality of longitudinal dovetailed grooves crossing said circumferential groove or grooves, a corresponding number of segments mounted on the core, each having a dovetailed rib to fit-said grooves, and also having one or more key-receiving recesses crossing said rib opposite the circumferential groove or grooves in the core, and a plurality of curved keys contained in said circumferential groove or grooves which are arranged in alinement and enter the transverse recesses in the segments, and means for holding said keys in place, substantially as described.

2. In a grinding or crushing head or roll, a core having one or more continuous external circumferential grooves and one or more passages through the eore leading thereto, and also having a plurality of longitudinal dovetailed grooves crossing said circumferential In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

VOLNEY W. MASON, JR.

Witnesses:

B. J. NoYEs, H. B. DAVIS. 

